Function padd

Eigen/src/Core/products/GeneralBlockPanelKernel.h:574–580

template<typename Packet>
DoublePacket<Packet> padd(const DoublePacket<Packet> &a, const DoublePacket<Packet> &b)
{
  DoublePacket<Packet> res;
  res.first  = padd(a.first, b.first);
  res.second = padd(a.second,b.second);
  return res;
}

template<typename Packet>
const DoublePacket<Packet>& predux_downto4(const DoublePacket<Packet> &a)